Malicious PDF — malware analysis report

Static analysis result for SHA-256 46581a5c40dab131…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 02:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f54cf5e165e020250990b918231b00e SHA-1: c59efce2e23a4446b30a3461506c8c6cb0b187cb SHA-256: 46581a5c40dab131548934435d306d85986b76764e6bdab00f0bbe33e447d565
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially corrupted, contains text related to 'Sql server express tutorial pdf', suggesting a lure. The primary malicious IOC is the redirector URL, which is used to obscure the final destination. The file also contains a PDF_SEO_LINK_FARM heuristic, suggesting it is part of a larger network of documents designed to manipulate search engine results.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=sql+server+express+tutorial+pdf
    • http://files.geostructuralengineering.com/uploads/1/3/1/3/131381428/854a9.pdf
    • http://files.colourwizards.com/uploads/1/3/0/9/130969062/nefilejabosazit-metiloradogiz.pdf
    • http://jixeder.thepostamerican.com/uploads/1/3/2/3/132303382/1593dc9bfc1d5.pdf
    • http://vagesafim.abbepsychservices.com/uploads/1/3/1/4/131407089/6988201.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/82533619137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/adaptive_control_astrom_wittenmark.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/10612663752.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/79146230852.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/pdf_editor_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/27071427818.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/zowutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/alif_episode_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/migumiworolewirunokiwum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f98.bin
4c8c4068998a3bf9576aba4a4c4c97c7bf784d57fe83643ae471f4b5c503f539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 5392 bytes
font_01_sfnt_off00007208.bin
80d976a853f7b187967a2518d6eac3d6a6c9bd244d127c3b19ec2315dab35487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 10756 bytes

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